Abstract: A method for constructing a multistage network includes: deploying a plurality of nodes; constructing the upper network with at least one node of the plurality of nodes; and in response to determining there is an isolated node, determining an intermediate node for the isolated node and adding the isolated node into the upper network or one of the at least one sub-network according to the intermediate node.

Abstract: A method for constructing a multistage network includes: deploying a plurality of nodes; constructing the upper network with at least one node of the plurality of nodes; and in response to determining there is an isolated node, determining an intermediate node for the isolated node and adding the isolated node into the upper network or one of the at least one sub-network according to the intermediate node.

Abstract: A triboelectric sensor device with a substantially cylindrical nonconductive core, and a conductive fiber substantially helically disposed around the conductive core and in an axial direction thereof. Example implementations also include a method of extracting communication from body position, by transforming one or more training body position inputs by a principal component analysis, generating training input to a support vector machine (SVM) based on a target body position, and generating one or more SVM classification outputs associated with the target body position.

Abstract: The invention belongs to the technical field of alarm sounding component, and relates to state detection of an alarm sounding component. The invention provides a state detection device of an alarm sounding component, comprising: a detection circuit for applying a detection signal to control detection of an equivalent load capacitor of the alarm sounding component that is capacitive; a sampling circuit for sampling feedback information of the equivalent load capacitor of the alarm sounding component when a signal of the detection signal is applied to the alarm sounding component to obtain a sampled signal; and a controller for generating the detection signal, and analyzing and processing the sampled signal to obtain state information which can reflect a fault condition of the alarm sounding component.

Abstract: A buzzer comprises a housing (1) and a buzzer plate (2) cooperating therewith to form a cavity (3). The cavity (3) has a sounding hole (4) in communication with the outside, and the cavity (3) is configured such that the ratio between its outer diameter (D1) and the height (H) of the buzzer is greater than 6.5 and/or the ratio between the diameter (D3) of the sounding hole (4) and the inner diameter (D2) of the cavity (3) is not greater than 0.5. A buzzer device comprising the buzzer, and a security apparatus comprising the buzzer or the buzzer device are also provided. The buzzer has advantages such as low manufacturing cost, compact structure and stable working performance. It can significantly improve the loudness of the buzzer and meet the requirements of sound pressure level for different frequency bands.

Abstract: The invention belongs to the technical field of alarm sounding component, and relates to state detection of an alarm sounding component. The invention provides a state detection device of an alarm sounding component, comprising: a detection circuit for applying a detection signal to control detection of an equivalent load capacitor of the alarm sounding component that is capacitive; a sampling circuit for sampling feedback information of the equivalent load capacitor of the alarm sounding component when a signal of the detection signal is applied to the alarm sounding component to obtain a sampled signal; and a controller for generating the detection signal, and analyzing and processing the sampled signal to obtain state information which can reflect a fault condition of the alarm sounding component.

Abstract: The present disclosure describes systems and methods to provide a digital wakeup timer with reduced size and lower power. An example system or apparatus includes a wakeup timer employing a digital-intensive frequency-locked loop (DFLL) architecture to fully utilize the advantages of advanced CMOS processes. Such a system includes a bang-bang frequency detector, a digital loop filter, a digitally-controlled oscillator (DCO), and a multi-phase clock generator. An output of the bang-bang frequency detector is provided to an input of the digital loop filter. An output of the digital loop filter is provided to the DCO. An output of the DCO includes information indicative of an output frequency. The multi-phase clock generator provides respective clock signals based on the output frequency to the bang-bang frequency detector, the digital loop filter, and the DCO.

Abstract: The present disclosure describes systems and methods to provide a digital wakeup timer with reduced size and lower power. An example system or apparatus includes a wakeup timer employing a digital-intensive frequency-locked loop (DFLL) architecture to fully utilize the advantages of advanced CMOS processes. Such a system includes a bang-bang frequency detector, a digital loop filter, a digitally-controlled oscillator (DCO), and a multi-phase clock generator. An output of the bang-bang frequency detector is provided to an input of the digital loop filter. An output of the digital loop filter is provided to the DCO. An output of the DCO includes information indicative of an output frequency. The multi-phase clock generator provides respective clock signals based on the output frequency to the bang-bang frequency detector, the digital loop filter, and the DCO.

Abstract: Method, system and device for acquiring directionally published microblog messages are disclosed. A first client acquires an instruction for reading a microblog message from a first user, wherein the instruction comprises a keyword of the first user; the first client extracts directionally published microblog messages matching with the keyword of the first user from an outbox of a second user, wherein the second user is followed the first user and has a directional publishing authority; and the first terminal displays the extracted directionally published microblog messages to the first user. Through the solutions provided the present disclosure, a first user only needs to access an outbox of a second user for acquiring a microblog message, and thus the first user does not need to delete the microblog message. The operation of the first user is simplified, and thereby the user experience will be improved.

Abstract: A method and a system for data migration are described, the method for data migration including: slicing data in an original system to obtain a data slice; importing the data slice into a new system; and redoing, in the new system, respective data corresponding to at least one pre-recorded write request according to a sequence number order of the at least one pre-recorded write request, wherein the at least one pre-recorded write request above is to simultaneously write to both the original system and the new system. In the method and the system, data in an original system can be seamlessly imported to a new system without forbidding writes to the original system, and the data in the new system can be recovered to the latest by a redo technique. Without any awareness of users, the data migration can be achieved in the background.

Abstract: A data synchronization method is provided. The data synchronization method includes providing a first server with a master flag and a write flag for a data block; providing a second server; and importing a snapshot of the data block to the second server. The method further includes configuring a synchronizing flag for the data block on the second server; synchronizing, by a synchronizing component, data of the data block on the first server to the second server; and removing the write flag of the data block on the first server when the data block is to be migrated out of the first server.

Abstract: A data synchronization method is provided. The data synchronization method includes providing a first server with a master flag and a write flag for a data block; providing a second server; and importing a snapshot of the data block to the second server. The method further includes configuring a synchronizing flag for the data block on the second server; synchronizing, by a synchronizing component, data of the data block on the first server to the second server; and removing the write flag of the data block on the first server when the data block is to be migrated out of the first server.

Abstract: Method, system and device for acquiring directionally published microblog messages are disclosed. A first client acquires an instruction for reading a microblog message from a first user, wherein the instruction comprises a keyword of the first user; the first client extracts directionally published microblog messages matching with the keyword of the first user from an outbox of a second user, wherein the second user is followed the first user and has a directional publishing authority; and the first terminal displays the extracted directionally published microblog messages to the first user. Through the solutions provided the present disclosure, a first user only needs to access an outbox of a second user for acquiring a microblog message, and thus the first user does not need to delete the microblog message. The operation of the first user is simplified, and thereby the user experience will be improved.

Abstract: A method and a system for data migration are described, the method for data migration including: slicing data in an original system to obtain a data slice; importing the data slice into a new system; and redoing, in the new system, respective data corresponding to at least one pre-recorded write request according to a sequence number order of the at least one pre-recorded write request, wherein the at least one pre-recorded write request above is to simultaneously write to both the original system and the new system. In the method and the system, data in an original system can be seamlessly imported to a new system without forbidding writes to the original system, and the data in the new system can be recovered to the latest by a redo technique. Without any awareness of users, the data migration can be achieved in the background.